python: Port the python2.4 patches to 2.7

Signed-off-by: Maxime Ripard <ripard@archos.com>

package/python/python-2.7-002-cross-compile.patch

@@ -0,0 +1,47 @@
+Second patch to bring cross-compilation support to python build-system.
+
+Allow the libraries detection routine to look for headers and libs in
+other directories than /usr/include or /usr/lib through the env variables
+PYTHON_MODULES_INCLUDE and PYTHON_MODULES_LIB.
+
+We can then use it to look for libraries in the buildroot staging directory.
+
+
+Patch ported to python2.7 by Maxime Ripard <ripard@archos.com>
+
+diff -rduNp Python-2.7.orig/setup.py Python-2.7/setup.py
+--- Python-2.7.orig/setup.py	2010-09-21 17:15:31.000000000 +0200
++++ Python-2.7/setup.py	2010-09-21 17:20:46.000000000 +0200
+@@ -346,6 +346,18 @@ class PyBuildExt(build_ext):
+         return sys.platform
+ 
+     def detect_modules(self):
++        try:
++            modules_include_dirs = os.environ["PYTHON_MODULES_INCLUDE"].split()
++        except KeyError:
++            modules_include_dirs = ['/usr/include']
++        try:
++            modules_lib_dirs = os.environ["PYTHON_MODULES_LIB"].split()
++        except KeyError:
++            modules_include_dirs = ['/usr/lib']
++        for dir in modules_include_dirs:
++            add_dir_to_list(self.compiler.include_dirs, dir)
++        for dir in modules_lib_dirs:
++            add_dir_to_list(self.compiler.library_dirs, dir)
+         # Add paths specified in the environment variables LDFLAGS and
+         # CPPFLAGS for header and library files.
+         # We must get the values from the Makefile and not the environment
+@@ -388,11 +400,8 @@ class PyBuildExt(build_ext):
+         # lib_dirs and inc_dirs are used to search for files;
+         # if a file is found in one of those directories, it can
+         # be assumed that no additional -I,-L directives are needed.
+-        lib_dirs = self.compiler.library_dirs + [
+-            '/lib64', '/usr/lib64',
+-            '/lib', '/usr/lib',
+-            ]
+-        inc_dirs = self.compiler.include_dirs + ['/usr/include']
++        lib_dirs = self.compiler.library_dirs
++        inc_dirs = self.compiler.include_dirs
+         exts = []
+         missing = []
+